octatriene

Octatriene

This is charles igwe contribution on OCTATRIENE

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Charles:
I think the last part of your synthesis would work fairly well. The first steps are problematic because you can't do an
sn2 reaction on a vinyl halide. One possibiligy would be to do it on an aldehyde and then dehydrate, Another reaction of halides that we didn't go into in class is the Heck reaction. This involves direct coupling of an aryl, vinyl, or benzyl halide with any alkene. Google it, and you will find several examples. It is an increadibly versitile reaction.
Bruce Bondurant





Dr B, please could you re evaluate the above reaction as i have made the correction for my extra credit

octa -2,4,6-triene

This is another charles igwe contribution on octa- 2 ,4,6- triene

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Thanks to prof. Siska Vijaya (chemistry texas univerisity )

This one looka good. You just need to write up a description and you are done.
DESCRIPTION
In the first process,acetylene is reacted with sodium amide in methyl bromide to form methylacetyelene,and in the second process, acetylene is reacted with catecholborane (through hydroboration) to form a trans-viyl borane usually, in this case its not vinyl due to rearranging, in the third process, ethane is combined with Br2 and the content are submitted to ultraviolet light to form a trans 1, 2 -dibromoethene,and in the final process,each of the pieces made from process 1-3 are combined together and reacted to form the 2,4,6-octatriene

Thanks to prof. Siska Vijaya ( chemisty texas university)